Pay For It Self Food:

when playing the game go into buy mode. then choose a fish tank or a fruit tree or a vegatable patch. Then buy and place anywhere you want. Make sure you water/feed it at least twice a day. then after a day or 2 you select it then click harvest. It will then appear when you go to the fridge and if you select one of the food you have harvested then you dont have to pay! and it is normaly better then the food you can buy. different fish tanks/plants will give you different food.